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Russula earlei
Russula earlei (actual genome source) by Brian P. Looney

This genome was sequenced as part of the JGI CSP “1KFG - Deep Sequencing of Ecologically-relevant Dikarya“ and more specifically as a part of the Russulaceae Sequencing Project, which seeks to densely sample members of a diverse lineage of ectomycorrhizal (ECM) fungi to examine functional diversity of ECM fungi with a shared evolutionary history.

Russula earlei Peck – Earle’s Russula

Russula earlei is a widespread and variable species occurring in hardwood forests throughout the Appalachian Mountains and southwards to the high peaks of Central America. It is characterized by a yellow-brown roughened cap with a cuticle that does not peel away, thick, widely spaced gills, a waxy texture, a cartilaginous stipe, and weakly amyloid spore ornamentation (Buyck 1998). This species is part of the Archaea clade of Russula, a species-poor clade (Looney et al. 2016). The species is closely related to the “blackening Russulas” or Nigricans clade (Looney et al. 2016). The sporocarps for this genome were collected on July 17, 2015 under a large Quercus sp. in a mixed temperate forest along a Quiet Walkway in the Great Smoky Mountains National Park. This species is a representative of a species-poor clade of Russula hypothesized to be the ancestral form of Russula and will be important for understanding the evolution of functional diversity of Russulaceae.

Researchers who wish to publish analyses using data from unpublished CSP genomes are respectfully required to contact the PI and JGI to avoid potential conflicts on data use and coordinate other publications with the CSP master paper(s).


Adamčík, S., Jančovičová, S. and Buyck, B., 2018. The Russulas described by Charles Horton Peck. Cryptogamie, Mycologie, 39(1), pp.3-109.

Buyck, B., 1998. Une révision critique de la sect. Archaeinae (Russula, Russulales). Belgian Journal of Botany, pp.116-126.

Looney, B.P., Ryberg, M., Hampe, F., Sánchez‐García, M. and Matheny, P.B., 2016. Into and out of the tropics: global diversification patterns in a hyper‐diverse clade of ectomycorrhizal fungi. Molecular ecology, 25, pp.630-647.

Genome Reference(s)